Whitewashed mosque contains the world's largest carpet.

The oldest surviving mosque in the UAE has mysterious origins and unusual architecture.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.

The largest falcon hospital in the world, caring for over 6,000 feathered patients every year.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

The world’s largest LED display, built over an F1 race circuit.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

Museum dedicated to the terror regimes of Hungary.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.